Cousins, AsaphBaroli, IreneBadger, MurrayIvakov, AlexanderLea, Peter JLeegood, Richard Cvon Caemmerer, Susanne2015-12-100032-0889http://hdl.handle.net/1885/57248Phosphoenolpyruvate carboxylase (PEPC; EC 4.1.1.31) plays a key role during C4 photosynthesis and is involved in anaplerotic metabolism, pH regulation, and stomatal opening. Heterozygous (Pp) and homozygous (pp) forms of a PEPC-deficient mutant of the C4Keywords: Carbon dioxide; Isotopes; pH effects; Photosynthesis; Reduction; Assimilation rates; Isotope exchange; Phosphoenolpyruvate carboxylase; Stomatal conductance; Enzyme activity; carbon; phosphoenolpyruvate carboxylase; Amaranthus; article; cytology; enzymolo200710.1104/pp.107.1033902015-12-09